JP2878083B2 - Receiver for mobile communication base station - Google Patents
Receiver for mobile communication base stationInfo
- Publication number
- JP2878083B2 JP2878083B2 JP5227684A JP22768493A JP2878083B2 JP 2878083 B2 JP2878083 B2 JP 2878083B2 JP 5227684 A JP5227684 A JP 5227684A JP 22768493 A JP22768493 A JP 22768493A JP 2878083 B2 JP2878083 B2 JP 2878083B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- base station
- radio
- receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車電話システム等の
基地局である移動通信用基地局の受信装置に関し、特に
検波後ダイバーシチ受信方式をとる移動通信用基地局の
受信装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving apparatus for a mobile communication base station which is a base station for a mobile telephone system or the like, and more particularly to a receiving apparatus for a mobile communication base station which employs a diversity receiving system after detection.
【０００２】[0002]
【従来の技術】従来のこの種の移動通信用基地局の受信
装置の一つが、公開特許公報（平２−９７１３２号，発
明の名称：ダイバーシチ受信システム）に開示されてい
る。この受信装置は移動局の送信する同一の無線信号を
スペースダイバーシチをなす二つの受信アンテナに受け
る。二つの受信アンテナからの無線信号は、別々の受信
機でそれぞれ検波されて復調データを生じる。ここで、
二つの無線信号の受信レベルがそれぞれ測定され、受信
レベルの高い方の受信機の出力した復調データを所要デ
ータとして選択する。このダイバーシチ受信方式は、検
波後ダイバーシチ受信方式あるいは選択ダイバーシチ受
信方式と呼ばれる。このような検波後ダイバーシチ受信
方式は、移動通信に特有のフェージング特性を改善する
ために実施される。2. Description of the Related Art A conventional receiving apparatus for a mobile communication base station of this type is disclosed in Japanese Patent Laid-Open Publication No. 2-97132 (Title of Invention: Diversity Receiving System). This receiving apparatus receives the same radio signal transmitted by a mobile station at two receiving antennas forming a space diversity. Radio signals from the two receiving antennas are detected by separate receivers, respectively, to generate demodulated data. here,
The reception levels of the two radio signals are measured, and the demodulated data output from the receiver having the higher reception level is selected as the required data. This diversity reception method is called a post-detection diversity reception method or a selective diversity reception method. Such a diversity reception method after detection is implemented to improve fading characteristics peculiar to mobile communication.
【０００３】[0003]
【発明が解決しようとする課題】上述の移動通信用基地
局の受信装置は、１つの周波数帯の無線信号のみを受信
している。しかし、自動車電話システムの同一ゾーン内
に存在する複数の移動局が全て同一の周波数帯を使用す
る局だけでない場合、基地局は移動局の使用する複数の
周波数帯の無線信号を受信する必要がある。この複数周
波数帯の無線信号の受信のためには、複数周波数帯の各
各ごとにその受信チャネル数に応じた受信装置を設置す
る必要があり、基地局の設備コストおよび設置スペース
の増大を招くという問題があった。The receiving device of the above-described base station for mobile communication receives only a radio signal of one frequency band. However, when a plurality of mobile stations existing in the same zone of the mobile telephone system are not all stations using the same frequency band, the base station needs to receive radio signals in a plurality of frequency bands used by the mobile station. is there. In order to receive the radio signals in the plurality of frequency bands, it is necessary to install a receiving device corresponding to the number of reception channels for each of the plurality of frequency bands, which causes an increase in equipment cost and installation space of the base station. There was a problem.
【０００４】[0004]
【課題を解決するための手段】本発明による移動通信用
基地局の受信装置は、第１の周波数帯の第１のチャネル
群に属する第１の無線信号を受ける複数の第１のアンテ
ナと、前記第１のチャネル群のうちの受信可能なチャネ
ルごとに設けられ，前記複数の第１のアンテナからの前
記第１の無線信号を受信信号とする検波後ダイバーシチ
受信方式の受信機とを備える移動通信用基地局の受信装
置において、前記第１の周波数帯の１．５倍程度の周波
数である第２の周波数帯の第２のチャネル群に属する第
２の無線信号を受ける前記第１のアンテナと同数の第２
のアンテナと、前記第２のアンテナからの前記第２の無
線信号を前記第１のチャネル群の高周波数信号に周波数
変換する前記第２の無線信号の各各対応の周波数変換部
と、前記第１のアンテナの各各に対応して設けられ，前
記第１の無線信号または前記高周波数信号のいずれかを
前記受信信号に切り替える高周波スイッチと、受信すべ
き前記無線信号の周波数帯に応じて前記高周波スイッチ
を切替制御する切替制御部とをさらに備える。Receiver of the mobile communication base station according to the present invention, in order to solve the above-mentioned object, a plurality of first antenna receiving a first radio signal belonging to a first group of channels of the first frequency band provided for each receivable channel of the first channel group, and a receiver post detection diversity reception scheme for the first radio signal from the plurality of first antenna and the receiving signal In the receiving device of the mobile communication base station, the frequency of about 1.5 times the first frequency band is used.
The same number of second antennas as the number of the first antennas receiving the second radio signals belonging to the second channel group of the second frequency band
And a corresponding frequency converter for each of the second radio signals for frequency-converting the second radio signal from the second antenna into a high-frequency signal of the first channel group; It provided corresponding to each respective one of the antennas, one of the front <br/> Symbol first radio signal or said high-frequency signal
A high frequency switch for switching before Symbol received signal, received all
A switching control unit that controls switching of the high-frequency switch according to a frequency band of the wireless signal .
【０００５】前記移動通信用基地局の受信装置の一つ
は、前記第１のアンテナと前記第２のアンテナとが、そ
れぞれ二つ設けられている構成を採ることができる。[0005] One of the receiving devices of the mobile communication base station can adopt a configuration in which the first antenna and the second antenna are provided two each.
【０００６】また、前記移動通信用基地局の受信装置の
別の一つは、前記周波数変換部が、屋外に配置されると
ともに前記受信機を収容する屋内装置から同軸ケーブル
によって電源供給を受ける構成を採ることができる。Another one of the receiving apparatuses of the mobile communication base station is configured such that the frequency conversion unit is placed outdoors and receives power supply from an indoor apparatus housing the receiver by a coaxial cable. Can be adopted.
【０００７】[0007]
【実施例】次に本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【０００８】図１は本発明の一実施例のブロック図であ
る。また、図２は本実施例における主要信号の周波数配
置図である。FIG. 1 is a block diagram of one embodiment of the present invention. FIG. 2 is a frequency allocation diagram of main signals in the present embodiment.
【０００９】図１および図２を参照し、まず、この移動
通信用基地局の受信装置について説明すると、図１の基
地局装置は、日本国内で運用されているデジタル方式自
動車電話システム標準規格（ＲＣＲ ＳＴＤ−２７Ｄ，
財団法人：電波システム開発センター発行）による自動
車電話システムの移動局（図示せず）から、第１の周波
数帯の無線信号Ｓ１（Ｓ１ａおよびＳ１ｂ）を受信アン
テナ１および受信アンテナ３に受けてダイバーシチ受信
する。また、この基地局装置は、第１の周波数帯とは互
いに異なる第２の周波数帯の無線信号Ｓ２（Ｓ２ａおよ
びＳ２ｂ）を別の移動局（図示せず）から受信アンテナ
２および受信アンテナ４に受けてダイバーシチ受信す
る。Referring to FIG. 1 and FIG. 2, the receiving device of the mobile communication base station will be described first. The base station device of FIG. RCR STD-27D,
The radio signal S1 (S1a and S1b) of the first frequency band is received by the receiving antenna 1 and the receiving antenna 3 from the mobile station (not shown) of the automobile telephone system issued by the Radio System Development Center, and diversity reception is performed. I do. Further, this base station apparatus transmits a radio signal S2 (S2a and S2b) in a second frequency band different from the first frequency band from another mobile station (not shown) to reception antenna 2 and reception antenna 4. And receive diversity reception.
【００１０】無線信号Ｓ１は、９４０．０ＭＨｚないし
９６０．０ＭＨｚ（９５０ＭＨｚ帯）の２０ＭＨｚ帯域
に含まれ、２５ＫＨｚ間隔で８００チャネル（ｃｈ）の
チャネル群を構成している。基地局９はこれら８００ｃ
ｈのうちの予め定めたチャネルの無線信号Ｓ１を受信す
る。一方、無線信号Ｓ２は、１４３９．０ＭＨｚないし
１４４３．０ＭＨｚ（１．４ＧＨｚ帯）の４ＭＨｚ帯域
に含まれ、２５ＫＨｚ間隔で８０ｃｈのチャネル群を構
成する。基地局９はこれら８０ｃｈのうちの予め定めた
チャネルの無線信号Ｓ２を受信する。ここで、無線信号
Ｓ２は、無線信号Ｓ１の１．５倍程度の周波数であり，
無線信号Ｓ１とは互いに別の周波数バンドに属してい
る。 The radio signal S1 is included in a 20 MHz band from 940.0 MHz to 960.0 MHz (950 MHz band), and forms a channel group of 800 channels (ch) at intervals of 25 KHz. The base station 9 uses these 800c
The wireless signal S1 of the predetermined channel among h is received. On the other hand, the radio signal S2 is included in a 4 MHz band from 1439.0 MHz to 1443.0 MHz (1.4 GHz band), and forms a channel group of 80 channels at 25 KHz intervals. The base station 9 receives the radio signal S2 of a predetermined channel among these 80 channels. Where the radio signal
S2 is about 1.5 times the frequency of the radio signal S1,
The radio signal S1 belongs to different frequency bands from each other.
You.
【００１１】周波数変換部５は受信アンテナ２からの１
４３９．０ＭＨｚないし１４４３．０ＭＨｚの無線信号
Ｓ２ａを９４０．０ＭＨｚないし９４４．０ＭＨｚの高
周波数信号Ｓ５ａに周波数変換する。同様に、周波数変
換部６は受信アンテナ４からの１４３９．０ＭＨｚない
し１４４３．０ＭＨｚの無線信号Ｓ２ｂを９４０．０Ｍ
Ｈｚないし９４４．０ＭＨｚの高周波数信号Ｓ５ｂに周
波数変換する。[0011] The frequency converter 5 receives the 1
A radio signal S2a of 439.0 MHz to 1443.0 MHz is frequency-converted to a high frequency signal S5a of 940.0 MHz to 944.0 MHz. Similarly, the frequency converter 6 converts the radio signal S2b of 1439.0 MHz to 1443.0 MHz from the receiving antenna 4 to 940.0 M
The frequency is converted into a high-frequency signal S5b of Hz to 944.0 MHz.
【００１２】無線信号Ｓ１ａおよび高周波数信号２ａ
は、切替制御信号Ｓ４により制御される高周波（ＲＦ）
スイッチ７によりどちらか一方の信号が選択され、受信
信号Ｓ６ａとして基地局９の受信端子９０１に供給され
る。同様に、無線信号Ｓ１ａおよび高周波数信号２ａ
は、ＲＦスイッチ７と同期切替されるＲＦスイッチ８に
より、無線信号Ｓ１およびＳ２における周波数帯がＲＦ
スイッチ７の選択した信号と同一の信号を選択され、こ
の選択された信号が受信信号Ｓ６ｂとして基地局９の受
信端子９０２に供給される。Radio signal S1a and high frequency signal 2a
Is a high frequency (RF) controlled by the switching control signal S4
One of the signals is selected by the switch 7 and supplied to the reception terminal 901 of the base station 9 as a reception signal S6a. Similarly, the radio signal S1a and the high-frequency signal 2a
The frequency band in the radio signals S1 and S2 is changed to RF by the RF switch 8 synchronized with the RF switch 7.
The same signal as the signal selected by the switch 7 is selected, and the selected signal is supplied to the reception terminal 902 of the base station 9 as a reception signal S6b.
【００１３】基地局９は同一チャネルの受信信号Ｓ６ａ
とＳ６ｂとを検波後ダイバーシチ受信し、復調データＳ
９６（Ｓ９６ａ，Ｓ９６ｂ，…，Ｓ９６ｎ）を生じる。
基地局９は、このダイバーシチ受信によって通信品質の
改善された復調データＳ９６を用いて、上記移動局と端
子９０５を介して接続した交換局（図示せず）との間の
通話接続および通話を実行および制御する。The base station 9 receives the received signal S6a of the same channel.
And S6b are detected after diversity reception and demodulated data S
96 (S96a, S96b,..., S96n).
The base station 9 executes a call connection and a call between the mobile station and an exchange (not shown) connected via the terminal 905 by using the demodulated data S96 whose communication quality is improved by the diversity reception. And control.
【００１４】次に、この基地局装置の送信装置について
説明すると、図１の基地局９は、無線信号Ｓ１およびＳ
２と対になる送信チャネルを用い、送信端子９０３およ
び送信アンテナ１０を介して無線信号Ｓ３をこの移動通
信システムに属する移動局に送信する。この無線信号Ｓ
３は、上記第１の周波数帯および第２の周波数帯の信号
を含んでいる。Next, the transmitting device of the base station apparatus will be described. The base station 9 shown in FIG.
The radio signal S3 is transmitted to a mobile station belonging to this mobile communication system via the transmission terminal 903 and the transmission antenna 10 using the transmission channel paired with the mobile station 2. This radio signal S
3 includes the signals of the first frequency band and the second frequency band.
【００１５】なお、基地局９は屋内に収容し、周波数変
換部５および６は、受信雑音の増大を避けるため、屋外
に設置される受信アンテナ２および４の近くに配置す
る。また、受信アンテナ１とＲＦスイッチ７との間，Ｒ
Ｆスイッチ７と基地局９との間，受信アンテナ２と周波
数変換部５との間，周波数変換部５とＲＦスイッチ５と
の間，受信アンテナ３とＲＦスイッチ８との間，ＲＦス
イッチ８と基地局９との間，受信アンテナ４と周波数変
換部６との間，周波数変換部６とＲＦスイッチ８との間
および基地局９と送信アンテナ１０との間は、同軸ケー
ブルで接続している。The base station 9 is housed indoors, and the frequency converters 5 and 6 are arranged near the receiving antennas 2 and 4 installed outdoors to avoid an increase in reception noise. Further, between the receiving antenna 1 and the RF switch 7, R
Between the F-switch 7 and the base station 9, between the receiving antenna 2 and the frequency converter 5, between the frequency converter 5 and the RF switch 5, between the receiving antenna 3 and the RF switch 8, and between the RF switch 8 and the A coaxial cable is connected to the base station 9, between the receiving antenna 4 and the frequency converter 6, between the frequency converter 6 and the RF switch 8, and between the base station 9 and the transmitting antenna 10. .
【００１６】次に、基地局９について詳細に説明する。Next, the base station 9 will be described in detail.
【００１７】受信端子９０１から供給された受信信号Ｓ
６ａは、直流阻止用のコンデンサＣ９１を介して接続さ
れたハイブリッド（ＨＹＢ）９２により、ｎ（ｎは整
数）個の受信信号Ｓ９１（Ｓ９１ａ，Ｓ９１ｂ，…，Ｓ
９１ｎ）に分配される。これら受信信号Ｓ９１ａ，Ｓ９
１ｂ，…，Ｓ９１ｎは、ｎ個の送受信機（ＴＲＸ）９５
（９５ａ，９５ｂ，…，９５ｎ）にそれぞれ供給され
る。送受信機９５の各各は、互いに異なるとともに予め
定めたチャネルの受信信号Ｓ９１を受信する。すなわ
ち、この基地局９はｎチャネルの無線信号Ｓ１を受信可
能である。同様に、受信端子９０２から供給された受信
信号Ｓ６ｂは、直流阻止用のコンデンサＣ９２を介して
接続されたハイブリッド（ＨＹＢ）９３により、ｎ個の
受信信号Ｓ９２（Ｓ９２ａ，Ｓ９２ｂ，…，Ｓ９２ｎ）
に分配される。これら受信信号Ｓ９２ａ，Ｓ９２ｂ，
…，Ｓ９２ｎも、ｎ個の送受信機（ＴＲＸ）９５（９５
ａ，９５ｂ，…，９５ｎ）にそれぞれ供給される。The reception signal S supplied from the reception terminal 901
Reference numeral 6a denotes n (n is an integer) received signals S91 (S91a, S91b,..., S) by a hybrid (HYB) 92 connected via a DC blocking capacitor C91.
91n). These received signals S91a, S9
, S91n are n transceivers (TRX) 95
(95a, 95b,..., 95n). Each of the transceivers 95 receives a reception signal S91 of a different channel and a predetermined channel. That is, the base station 9 can receive the n-channel radio signal S1. Similarly, the reception signal S6b supplied from the reception terminal 902 is converted into n reception signals S92 (S92a, S92b,..., S92n) by a hybrid (HYB) 93 connected via a DC blocking capacitor C92.
Distributed to These received signals S92a, S92b,
, S92n also have n transceivers (TRX) 95 (95
, 95b,..., 95n).
【００１８】送受信機９５は、２系列の受信回路を備え
ており、受信信号Ｓ９１およびＳ９２を別々に受信・復
調する。また、送受信機９５は、二つの受信信号Ｓ９１
およびＳ９２の受信レベルをそれぞれ測定しており、受
信レベルの高い受信信号を受けた受信回路からの復調デ
ータを選択する検波後ダイバーシチ受信を実行する。こ
の選択された復調データが、送受信機９５（９５ａ，９
５ｂ，…，９５ｎ）の復調データＳ９４（Ｓ９４ａ，Ｓ
９４ｂ，…，Ｓ９４ｎ）とされる。制御部９７は、この
復調データＳ９４を用いて、送受信機９５の制御，上記
交換局との通話および接続制御等を行う。The transmitter / receiver 95 has a two-series receiving circuit, and receives and demodulates the received signals S91 and S92 separately. Also, the transceiver 95 has two reception signals S91.
And the reception level of S92, and performs diversity reception after detection for selecting demodulated data from a reception circuit that has received a reception signal with a high reception level. The selected demodulated data is transmitted to the transceiver 95 (95a, 9
5b,..., 95n) demodulated data S94 (S94a, S94a)
94b,..., S94n). Using the demodulated data S94, the control unit 97 performs control of the transceiver 95, communication with the exchange, and connection control.
【００１９】送受信機９５（９５ａ，９５ｂ，…，９５
ｎ）の各各は、また、上記移動局への送信信号Ｓ９３
（Ｓ９３ａ，Ｓ９３ｂ，…，Ｓ９３ｎ）をそれぞれ生じ
る。送信機９５からの送信信号Ｓ９３は、ハイブリッド
（ＨＹＢ）９４により信号結合され、送信端子９０３に
供給される。The transceiver 95 (95a, 95b,..., 95)
Each of n) is a transmission signal S93 to the mobile station.
(S93a, S93b,..., S93n). The transmission signal S93 from the transmitter 95 is signal-coupled by the hybrid (HYB) 94 and supplied to the transmission terminal 903.
【００２０】切替制御部９６は、切替制御端子９０４を
介して切替制御信号Ｓ４をＲＦスイッチ７および８の制
御端子に同時に供給する。すると、ＲＦスイッチ７およ
び８は、無線信号Ｓ１（Ｓ１ａおよびＳ１ｂ）側か高周
波数信号Ｓ５（Ｓ５ａおよびＳ５ｂ）側かのいずれかを
選択して基地局９に供給する。電源（ＰＳ）９１は、直
流電力Ｐ１をチョークコイルＬ９１，受信端子９０１，
ＲＦスイッチ７および接続用の上記同軸ケーブルを介し
て周波数変換部５に供給し、チョークコイルＬ９２，受
信端子９０２，ＲＦスイッチ８および接続用の上記同軸
ケーブルを介して直流電力Ｐ１を周波数変換部６に供給
する。The switching control section 96 simultaneously supplies a switching control signal S4 to the control terminals of the RF switches 7 and 8 via a switching control terminal 904. Then, the RF switches 7 and 8 select either the radio signal S1 (S1a and S1b) side or the high frequency signal S5 (S5a and S5b) side and supply them to the base station 9. The power supply (PS) 91 supplies the DC power P1 to the choke coil L91, the receiving terminal 901,
The DC power P1 is supplied to the frequency conversion unit 5 via the RF switch 7 and the coaxial cable for connection, and is supplied to the frequency conversion unit 6 via the choke coil L92, the receiving terminal 902, and the RF switch 8 and the coaxial cable for connection. To supply.
【００２１】図１の受信装置は、移動通信用基地局の受
信チャネルの増設用として特に有用である。つまり、９
５０ＭＨｚ帯（第１の周波数帯）用および１．４ＧＨｚ
帯（第２の周波数帯）用両方の受信装置を既に備えた移
動通信用基地局において、図１の受信装置を増設する
と、この受信装置では呼量の多い周波数帯の無線信号を
優先して切り替え受信することができるので、増設する
受信チャネル数（基地局９の送受信機９５の数）を少な
くできるという利点がある。The receiving apparatus shown in FIG. 1 is particularly useful for adding a receiving channel of a mobile communication base station. That is, 9
For 50 MHz band (first frequency band) and 1.4 GHz
In a mobile communication base station already equipped with both receiving devices for the band (second frequency band), if the receiving device shown in FIG. 1 is added, this receiving device gives priority to a radio signal in a frequency band with a large traffic volume. Since switching reception is possible, there is an advantage that the number of additional reception channels (the number of transceivers 95 of the base station 9) can be reduced.
【００２２】図３は本実施例に用いる周波数変換部５
（６）の詳細ブロック図である。FIG. 3 shows a frequency converter 5 used in this embodiment.
It is a detailed block diagram of (6).
【００２３】周波数変換部５の前置増幅器５１は、端子
５０１から受けた周波数ｆ１の無線信号Ｓ２（Ｓ２ａ）
を低雑音増幅し、無線信号Ｓ５１を生じる。この無線信
号Ｓ５１は、受信周波数変換器５３によって局部発振器
５２からの周波数ｆL の局部発振信号Ｓ５２と周波数混
合され、周波数ｆｒ＝（ｆ１−ｆL ）の高周波数信号Ｓ
５３に周波数変換される。いま、局部発振信号Ｓ５２の
周波数ｆL を４９９．０ＭＨｚとすると、無線信号Ｓ２
の周波数ｆ１が１，４３９，０ＭＨｚ（第２の周波数帯
の第１ｃｈ）のときには、高周波数信号Ｓ５３の周波数
ｆｒは、９４０．０ＭＨＺ（第１の周波数帯の第１ｃ
ｈ）になる。このように、周波数変換器５３は、この移
動通信システムの受信周波数帯の周波数帯変換を行う。
高周波数信号Ｓ５３は、４ＭＨｚより少し広い帯域幅を
有する帯域通過ろ波器５４により、雑音およびスプリア
スの低減を受け、さらに直流阻止用のコンデンサＣ５１
を介し、高周波数信号Ｓ５（Ｓ５ａ）として端子５０２
に出力される。The preamplifier 51 of the frequency conversion unit 5 receives the radio signal S2 (S2a) of the frequency f1 received from the terminal 501.
Is amplified with low noise to generate a radio signal S51. This radio signal S51 is frequency-mixed by the reception frequency converter 53 with the local oscillation signal S52 of the frequency f L from the local oscillator 52, and the high frequency signal S of the frequency fr = (f1-f L ) is obtained.
The frequency is converted to 53. Now, assuming that the frequency f L of the local oscillation signal S52 is 499.0 MHz, the radio signal S2
Is 1,439,0 MHz (the first channel of the second frequency band), the frequency fr of the high-frequency signal S53 is 940.0 MHZ (the first frequency band 1c).
h). Thus, the frequency converter 53 performs frequency band conversion of the reception frequency band of the mobile communication system.
The high-frequency signal S53 is subjected to noise and spurious reduction by a band-pass filter 54 having a bandwidth slightly wider than 4 MHz, and further includes a DC blocking capacitor C51.
Through the terminal 502 as a high frequency signal S5 (S5a).
Is output to
【００２４】また、端子５０２には直流電力Ｐ１が供給
されており、この直流電力Ｐ１はチョークコイルＬ１を
介して局部発振器５２および前置増幅器５１に電源とし
て供給される。なお、この周波数変換部５は屋外に設置
されており大きな温度変動を受けるので、局部発振器５
２には高周波数安定度の水晶発振器を源発振器として用
いる。Further, a DC power P1 is supplied to the terminal 502, and the DC power P1 is supplied as power to the local oscillator 52 and the preamplifier 51 via the choke coil L1. Since the frequency converter 5 is installed outdoors and receives a large temperature fluctuation, the local oscillator 5
For 2, a crystal oscillator having high frequency stability is used as a source oscillator.
【００２５】[0025]
【発明の効果】以上説明したように本発明は、第１の周
波数帯の第１の無線信号および第２の周波数帯の第２の
無線信号を一つの基地局で共用受信するために、上記第
１の周波数帯の信号を受信する上記基地局に加え、上記
第２の周波数帯の第２の無線信号を上記第１の周波数帯
と同じ周波数帯の高周波数信号に周波数変換する周波数
変換部を設け、上記第１の無線信号および上記高周波数
信号のどちらかを高周波スイッチにより切替・選択して
上記基地局の受信信号とするので、受信すべき無線信号
の周波数帯ごとに基地局を設置する必要がなく、基地局
の設備コストの減少および設置スペースの省スペース化
が図れるという効果がある。As described above, according to the present invention, the first radio signal of the first frequency band and the second radio signal of the second frequency band are shared and received by one base station. A frequency converter for frequency-converting a second radio signal of the second frequency band into a high-frequency signal of the same frequency band as the first frequency band, in addition to the base station for receiving a signal of the first frequency band; And a high-frequency switch is used to switch and select either the first radio signal or the high-frequency signal as a reception signal of the base station. Therefore, a base station is installed for each frequency band of a radio signal to be received. It is not necessary to perform the operation, and there is an effect that the equipment cost of the base station can be reduced and the installation space can be saved.
【００２６】本発明による移動通信用基地局の受信装置
は、特に、複数の周波数帯用の受信設備を既に備えた基
地局装置における受信チャネル数の増設要求に対して、
増設する受信機の数が少なくて済むという利点がある。The receiving apparatus for a mobile communication base station according to the present invention, in particular, responds to a request for increasing the number of receiving channels in a base station apparatus already equipped with receiving facilities for a plurality of frequency bands.
There is an advantage that the number of additional receivers can be reduced.
【図１】図１は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
【図２】本実施例における主要信号の周波数配置図であ
る。FIG. 2 is a frequency allocation diagram of main signals in the embodiment.
【図３】本実施例の基地局装置に用いる周波数変換部の
詳細ブロック図である。FIG. 3 is a detailed block diagram of a frequency conversion unit used in the base station device of the embodiment.
１〜４ 受信アンテナ ５，６ 周波数変換部 ７，８ 高周波（ＲＦ）スイッチ ９ 基地局 １０ 送信アンテナ ５１ 前置増幅器 ５２ 局部発振器 ５３ 受信周波数変換器 ５４ 帯域通過ろ波器 ５０１，５０２ 端子 ９１ 電源 ９２〜９４ ハイブリッド（ＨＹＢ） ９５（９５ａ，９５ｂ，…，９５ｎ） 送受信機（Ｔ
ＲＸ） ９６ 切替制御部 ９７ 制御部 ９０１，９０２ 受信端子 ９０３ 送信端子 ９０４ 切替制御端子 ９０５ 端子 Ｃ５１，Ｃ９１，Ｃ９２ コンデンサ Ｌ５１，Ｌ９１，Ｌ９２ チョークコイル1-4 Receiving antenna 5,6 Frequency converter 7,8 High frequency (RF) switch 9 Base station 10 Transmitting antenna 51 Preamplifier 52 Local oscillator 53 Receiving frequency converter 54 Bandpass filter 501,502 Terminal 91 Power supply 92 ... 94 Hybrid (HYB) 95 (95a, 95b, ..., 95n) Transceiver (T
RX) 96 Switching control unit 97 Control unit 901, 902 Reception terminal 903 Transmission terminal 904 Switching control terminal 905 Terminal C51, C91, C92 Capacitors L51, L91, L92 Choke coil
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−199141（ＪＰ，Ａ) 特開 平４−335723（ＪＰ，Ａ) 特開 平４−271624（ＪＰ，Ａ) 特開 昭62−77721（ＪＰ，Ａ) 実開 平５−65136（ＪＰ，Ｕ) 実開 平２−64251（ＪＰ，Ｕ) 斎藤茂樹、他４名，“＜デジタル移動 通信システム＞無線基地局系装置”，Ｎ ＴＴ ＤＯＣＯＭＯテクニカル・ジャー ナル，（社）電気通信協会，平成５年７ 月１日，Ｖｏｌ．１，Ｎｏ．１，ｐ．33 −38 (58)調査した分野(Int.Cl.6，ＤＢ名) H04B 1/38 - 1/58 H04B 7/00 H04B 7/02 - 7/12 H04B 7/24 - 7/26 113 H04L 1/02 - 1/06 H04Q 7/00 - 7/04 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-199141 (JP, A) JP-A-4-335723 (JP, A) JP-A-4-271624 (JP, A) JP-A-62-162 77721 (JP, A) Hikaru Hei 5-65136 (JP, U) Hikaru 2-64251 (JP, U) Shigeki Saito and 4 others, "<Digital mobile communication system> wireless base station equipment", N TT DOCOMO Technical Journal, Telecommunications Association, July 1, 1993, Vol. 1, No. 1, p. 33-38 (58) Surveyed fields (Int.Cl. 6 , DB name) H04B 1/38-1/58 H04B 7/00 H04B 7/02-7/12 H04B 7/24-7/26 113 H04L 1 / 02-1/06 H04Q 7/00-7/04
Claims (3)
する第１の無線信号を受ける複数の第１のアンテナと、
前記第１のチャネル群のうちの受信可能なチャネルごと
に設けられ前記複数の第１のアンテナからの前記第１の
無線信号を受信信号とする検波後ダイバーシチ受信方式
の受信機とを備える移動通信用基地局の受信装置におい
て、前記第１の周波数帯の１．５倍程度の周波数である 第２
の周波数帯の第２のチャネル群に属する第２の無線信号
を受ける前記第１のアンテナと同数の第２のアンテナ
と、前記第２のアンテナからの前記第２の無線信号を前
記第１のチャネル群の高周波数信号に周波数変換する前
記第２の無線信号の各各対応の周波数変換部と、前記第
１のアンテナの各各に対応して設けられ，前記第１の無
線信号または前記高周波数信号のいずれかを前記受信信
号に切り替える高周波スイッチと、受信すべき前記無線
信号の周波数帯に応じて前記高周波スイッチを切替制御
する切替制御部とをさらに備えることを特徴とする移動
通信用基地局の受信装置。And 1. A first plurality of first receiving a first first radio signal you genus <br/> the channel groups in the frequency band of the antenna,
Mobile communication comprising: a receiver of a diversity reception scheme after detection, wherein the receiver is provided for each receivable channel in the first channel group and uses the first wireless signal from the plurality of first antennas as a reception signal. In the receiving apparatus of the base station for use , the second frequency which is about 1.5 times the frequency of the first frequency band is used .
The same number of second antennas as the first antennas for receiving the second radio signals belonging to the second channel group of the frequency band of the second frequency band, and transmitting the second radio signals from the second antenna to the first Before frequency conversion to high frequency signal of channel group
Serial and frequency converter of the respective corresponding second radio signal, said provided corresponding to each respective of the first antenna, either the front Symbol received before Symbol first radio signal or said high-frequency signal A radio frequency switch for switching to a signal and the radio to be received
A switching control unit that controls switching of the high-frequency switch according to a frequency band of a signal .
ンテナが、それぞれ二つ設けられていることを特徴とす
る請求項１記載の移動通信用基地局の受信装置。2. The mobile communication base station receiving apparatus according to claim 1, wherein two said first antennas and two said second antennas are provided.
とともに前記受信機を収容する屋内装置から同軸ケーブ
ルによって電源供給を受けることを特徴とする請求項１
記載の移動通信用基地局の受信装置。3. The power supply according to claim 1, wherein the frequency conversion unit is placed outdoors and receives power supply from an indoor unit that accommodates the receiver via a coaxial cable.
The receiving device of the base station for mobile communication according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5227684A JP2878083B2 (en) | 1993-09-14 | 1993-09-14 | Receiver for mobile communication base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5227684A JP2878083B2 (en) | 1993-09-14 | 1993-09-14 | Receiver for mobile communication base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0786996A JPH0786996A (en) | 1995-03-31 |
| JP2878083B2 true JP2878083B2 (en) | 1999-04-05 |
Family
ID=16864718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5227684A Expired - Fee Related JP2878083B2 (en) | 1993-09-14 | 1993-09-14 | Receiver for mobile communication base station |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2878083B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100470443B1 (en) * | 2001-12-29 | 2005-02-07 | (주)하이게인안테나 | Unified repeater system for mobile communication service |
| KR20030090450A (en) * | 2002-05-23 | 2003-11-28 | (주)하이게인안테나 | Unified repeater system for mobile communication service |
| KR100688888B1 (en) * | 2005-04-15 | 2007-03-02 | 에스케이 텔레콤주식회사 | Connecting apparatus and system between base station and optic repeater |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2841900B2 (en) * | 1991-02-27 | 1998-12-24 | 日本電気株式会社 | Handoff method |
-
1993
- 1993-09-14 JP JP5227684A patent/JP2878083B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 斎藤茂樹、他４名，"＜デジタル移動通信システム＞無線基地局系装置"，ＮＴＴ ＤＯＣＯＭＯテクニカル・ジャーナル，（社）電気通信協会，平成５年７月１日，Ｖｏｌ．１，Ｎｏ．１，ｐ．３３−３８ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0786996A (en) | 1995-03-31 |
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